Bought and installed adsmanager extension for adsmanager 2.5 and artio version 3.2.9.

Everything works great except the module adsmanager menu

gives the following error

Fatal error: Call to undefined function: array_diff_key() in /home/sitename/components/com_sef/joomsef.php on line 598

It only happens when I try click on the categories. The other links on the menu work fine.

Can you give me an idea of how to fix.

So far I have un-installed and re-installed the menu module, cleared the cache but not luck.

Hello,

it seems this is PHP4 incompatibility problem. Function array_diff_key was introduces in PHP 5.1.0.
We will try to resolve this issue in the next release.
But plese not, PHP4 support will stop soon, so I would rather advice you to migrate your site to PHP5 server.